Lockheed Martinâ€™s Skunk Works acknowledged the existence of an SR-71 Blackbird, capable to fly at hypersonic speed with a dual ISR (Intelligence Surveillance Reconnaissance) and Strike capability, dubbed SR-72.

In accordance with the new slogan â€œspeed is the new stealthâ€, Skunk Works is studying high Mach systems that would give platform equipped with these weapons the capability to strike heavily defended targets, quickly and undetected.

Among LMâ€™s hypersonic programs focusing on both â€œexpendable missilesâ€ and â€œreusable aircraftâ€, the High Speed Strike Weapon (HSSW), â€œa hypersonic missile concept suitable for future bomber and fighter aircraftâ€ was not a secret.

However, there was only one HSSW concept image available.

Until Lockheed Martin released the one you can see on this post that is a bit more detailed (if any detail can be gathered from a rendering) than any previous one.